Finding the Third Proportional to 57,205.50 and 84,639.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,205.50 : 84,639.75 = 84,639.75 : x
2. Step 2: Convert to fraction form
   57,205.50/84,639.75 = 84,639.75/x
3. Step 3: Cross multiply
   57,205.50x = 84,639.75 × 84,639.75
4. Step 4: Simplify right side
   57,205.50x = 7,163,887,280.06
5. Step 5: Solve for x
   x = 7,163,887,280.06/57,205.50
6. Step 6: Final answer
   x = 125,230.74